Can somebody please explain me this logic?

Question

array = [1,2,3,4,5,6,7];
newArray = array;
trace ("array: " + array);
newArray = newArray.splice (0, 5);
trace ("array: " + array);
Output:
array: 1,2,3,4,5,6,7
array: 6,7
As you can see, I set a variable equal to another (newArray = array), then splice it. But the problem is, it is affecting the old variable too!
How can that be?
I need to use the complete original "array", but no matter how many variables I create equal to it, when I splice them, it affects all of them!
I might find a solution by turning the variable into string, then back to array or something like that. But what I would like is to understand what's going on in that code. If someone could explain me, i'd appreciate it a lot.

Answer 1

Thank you.
That helped me out.
I found my problem also in the Flash Documentation. I couldn't find it before because i didn't know what to look for.
Anyway, here's the link if someone wants it:
http://livedocs.adobe.com/flash/9.0/main/wwhelp/wwhimpl/common/html/wwhelp.htm?context=Liv eDocs_Parts&file=00000661.html
It teaches how to create a copy of an array using a "for", but "kglad's" method is much better.